Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 1 | /* |
| 2 | * QEMU x86 ISA testdev |
| 3 | * |
| 4 | * Copyright (c) 2012 Avi Kivity, Gerd Hoffmann, Marcelo Tosatti |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to deal |
| 8 | * in the Software without restriction, including without limitation the rights |
| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 10 | * copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 22 | * THE SOFTWARE. |
| 23 | */ |
| 24 | |
| 25 | /* |
| 26 | * This device is used to test KVM features specific to the x86 port, such |
| 27 | * as emulation, power management, interrupt routing, among others. It's meant |
| 28 | * to be used like: |
| 29 | * |
| 30 | * qemu-system-x86_64 -device pc-testdev -serial stdio \ |
| 31 | * -device isa-debug-exit,iobase=0xf4,iosize=0x4 \ |
| 32 | * -kernel /home/lmr/Code/virt-test.git/kvm/unittests/msr.flat |
| 33 | * |
| 34 | * Where msr.flat is one of the KVM unittests, present on a separate repo, |
| 35 | * git://git.kernel.org/pub/scm/virt/kvm/kvm-unit-tests.git |
| 36 | */ |
| 37 | |
Peter Maydell | b6a0aa0 | 2016-01-26 18:17:03 +0000 | [diff] [blame] | 38 | #include "qemu/osdep.h" |
Paolo Bonzini | 83c9f4c | 2013-02-04 15:40:22 +0100 | [diff] [blame] | 39 | #include "hw/hw.h" |
| 40 | #include "hw/qdev.h" |
Paolo Bonzini | 0d09e41 | 2013-02-05 17:06:20 +0100 | [diff] [blame] | 41 | #include "hw/isa/isa.h" |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 42 | |
| 43 | #define IOMEM_LEN 0x10000 |
| 44 | |
| 45 | typedef struct PCTestdev { |
| 46 | ISADevice parent_obj; |
| 47 | |
| 48 | MemoryRegion ioport; |
Paolo Bonzini | d2f5ea9 | 2013-07-22 15:54:38 +0200 | [diff] [blame] | 49 | MemoryRegion ioport_byte; |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 50 | MemoryRegion flush; |
| 51 | MemoryRegion irq; |
| 52 | MemoryRegion iomem; |
| 53 | uint32_t ioport_data; |
| 54 | char iomem_buf[IOMEM_LEN]; |
| 55 | } PCTestdev; |
| 56 | |
| 57 | #define TYPE_TESTDEV "pc-testdev" |
| 58 | #define TESTDEV(obj) \ |
Gerd Hoffmann | 00e4d0d | 2013-01-07 12:59:43 +0100 | [diff] [blame] | 59 | OBJECT_CHECK(PCTestdev, (obj), TYPE_TESTDEV) |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 60 | |
| 61 | static void test_irq_line(void *opaque, hwaddr addr, uint64_t data, |
| 62 | unsigned len) |
| 63 | { |
Gerd Hoffmann | 00e4d0d | 2013-01-07 12:59:43 +0100 | [diff] [blame] | 64 | PCTestdev *dev = opaque; |
| 65 | ISADevice *isa = ISA_DEVICE(dev); |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 66 | |
| 67 | qemu_set_irq(isa_get_irq(isa, addr), !!data); |
| 68 | } |
| 69 | |
| 70 | static const MemoryRegionOps test_irq_ops = { |
| 71 | .write = test_irq_line, |
| 72 | .valid.min_access_size = 1, |
| 73 | .valid.max_access_size = 1, |
| 74 | .endianness = DEVICE_LITTLE_ENDIAN, |
| 75 | }; |
| 76 | |
| 77 | static void test_ioport_write(void *opaque, hwaddr addr, uint64_t data, |
| 78 | unsigned len) |
| 79 | { |
Gerd Hoffmann | 00e4d0d | 2013-01-07 12:59:43 +0100 | [diff] [blame] | 80 | PCTestdev *dev = opaque; |
Paolo Bonzini | b7faba7 | 2013-07-22 15:54:26 +0200 | [diff] [blame] | 81 | int bits = len * 8; |
| 82 | int start_bit = (addr & 3) * 8; |
| 83 | uint32_t mask = ((uint32_t)-1 >> (32 - bits)) << start_bit; |
| 84 | dev->ioport_data &= ~mask; |
| 85 | dev->ioport_data |= data << start_bit; |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 86 | } |
| 87 | |
| 88 | static uint64_t test_ioport_read(void *opaque, hwaddr addr, unsigned len) |
| 89 | { |
Gerd Hoffmann | 00e4d0d | 2013-01-07 12:59:43 +0100 | [diff] [blame] | 90 | PCTestdev *dev = opaque; |
Paolo Bonzini | b7faba7 | 2013-07-22 15:54:26 +0200 | [diff] [blame] | 91 | int bits = len * 8; |
| 92 | int start_bit = (addr & 3) * 8; |
| 93 | uint32_t mask = ((uint32_t)-1 >> (32 - bits)) << start_bit; |
| 94 | return (dev->ioport_data & mask) >> start_bit; |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | static const MemoryRegionOps test_ioport_ops = { |
| 98 | .read = test_ioport_read, |
| 99 | .write = test_ioport_write, |
| 100 | .endianness = DEVICE_LITTLE_ENDIAN, |
| 101 | }; |
| 102 | |
Paolo Bonzini | d2f5ea9 | 2013-07-22 15:54:38 +0200 | [diff] [blame] | 103 | static const MemoryRegionOps test_ioport_byte_ops = { |
| 104 | .read = test_ioport_read, |
| 105 | .write = test_ioport_write, |
| 106 | .valid.min_access_size = 1, |
| 107 | .valid.max_access_size = 4, |
| 108 | .impl.min_access_size = 1, |
| 109 | .impl.max_access_size = 1, |
| 110 | .endianness = DEVICE_LITTLE_ENDIAN, |
| 111 | }; |
| 112 | |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 113 | static void test_flush_page(void *opaque, hwaddr addr, uint64_t data, |
| 114 | unsigned len) |
| 115 | { |
| 116 | hwaddr page = 4096; |
| 117 | void *a = cpu_physical_memory_map(data & ~0xffful, &page, 0); |
| 118 | |
| 119 | /* We might not be able to get the full page, only mprotect what we actually |
| 120 | have mapped */ |
Stefan Weil | 549db5c | 2013-01-05 09:33:43 +0100 | [diff] [blame] | 121 | #if defined(CONFIG_POSIX) |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 122 | mprotect(a, page, PROT_NONE); |
| 123 | mprotect(a, page, PROT_READ|PROT_WRITE); |
Stefan Weil | 549db5c | 2013-01-05 09:33:43 +0100 | [diff] [blame] | 124 | #endif |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 125 | cpu_physical_memory_unmap(a, page, 0, 0); |
| 126 | } |
| 127 | |
| 128 | static const MemoryRegionOps test_flush_ops = { |
| 129 | .write = test_flush_page, |
| 130 | .valid.min_access_size = 4, |
| 131 | .valid.max_access_size = 4, |
| 132 | .endianness = DEVICE_LITTLE_ENDIAN, |
| 133 | }; |
| 134 | |
| 135 | static uint64_t test_iomem_read(void *opaque, hwaddr addr, unsigned len) |
| 136 | { |
Gerd Hoffmann | 00e4d0d | 2013-01-07 12:59:43 +0100 | [diff] [blame] | 137 | PCTestdev *dev = opaque; |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 138 | uint64_t ret = 0; |
| 139 | memcpy(&ret, &dev->iomem_buf[addr], len); |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 140 | |
| 141 | return ret; |
| 142 | } |
| 143 | |
| 144 | static void test_iomem_write(void *opaque, hwaddr addr, uint64_t val, |
| 145 | unsigned len) |
| 146 | { |
Gerd Hoffmann | 00e4d0d | 2013-01-07 12:59:43 +0100 | [diff] [blame] | 147 | PCTestdev *dev = opaque; |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 148 | memcpy(&dev->iomem_buf[addr], &val, len); |
| 149 | dev->iomem_buf[addr] = val; |
| 150 | } |
| 151 | |
| 152 | static const MemoryRegionOps test_iomem_ops = { |
| 153 | .read = test_iomem_read, |
| 154 | .write = test_iomem_write, |
| 155 | .endianness = DEVICE_LITTLE_ENDIAN, |
| 156 | }; |
| 157 | |
Andreas Färber | db895a1 | 2012-11-25 02:37:14 +0100 | [diff] [blame] | 158 | static void testdev_realizefn(DeviceState *d, Error **errp) |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 159 | { |
Andreas Färber | db895a1 | 2012-11-25 02:37:14 +0100 | [diff] [blame] | 160 | ISADevice *isa = ISA_DEVICE(d); |
| 161 | PCTestdev *dev = TESTDEV(d); |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 162 | MemoryRegion *mem = isa_address_space(isa); |
| 163 | MemoryRegion *io = isa_address_space_io(isa); |
| 164 | |
Paolo Bonzini | 3c16154 | 2013-06-06 21:25:08 -0400 | [diff] [blame] | 165 | memory_region_init_io(&dev->ioport, OBJECT(dev), &test_ioport_ops, dev, |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 166 | "pc-testdev-ioport", 4); |
Paolo Bonzini | d2f5ea9 | 2013-07-22 15:54:38 +0200 | [diff] [blame] | 167 | memory_region_init_io(&dev->ioport_byte, OBJECT(dev), |
| 168 | &test_ioport_byte_ops, dev, |
| 169 | "pc-testdev-ioport-byte", 4); |
Paolo Bonzini | 3c16154 | 2013-06-06 21:25:08 -0400 | [diff] [blame] | 170 | memory_region_init_io(&dev->flush, OBJECT(dev), &test_flush_ops, dev, |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 171 | "pc-testdev-flush-page", 4); |
Paolo Bonzini | 3c16154 | 2013-06-06 21:25:08 -0400 | [diff] [blame] | 172 | memory_region_init_io(&dev->irq, OBJECT(dev), &test_irq_ops, dev, |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 173 | "pc-testdev-irq-line", 24); |
Paolo Bonzini | 3c16154 | 2013-06-06 21:25:08 -0400 | [diff] [blame] | 174 | memory_region_init_io(&dev->iomem, OBJECT(dev), &test_iomem_ops, dev, |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 175 | "pc-testdev-iomem", IOMEM_LEN); |
| 176 | |
| 177 | memory_region_add_subregion(io, 0xe0, &dev->ioport); |
| 178 | memory_region_add_subregion(io, 0xe4, &dev->flush); |
Paolo Bonzini | d2f5ea9 | 2013-07-22 15:54:38 +0200 | [diff] [blame] | 179 | memory_region_add_subregion(io, 0xe8, &dev->ioport_byte); |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 180 | memory_region_add_subregion(io, 0x2000, &dev->irq); |
| 181 | memory_region_add_subregion(mem, 0xff000000, &dev->iomem); |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 182 | } |
| 183 | |
| 184 | static void testdev_class_init(ObjectClass *klass, void *data) |
| 185 | { |
Andreas Färber | db895a1 | 2012-11-25 02:37:14 +0100 | [diff] [blame] | 186 | DeviceClass *dc = DEVICE_CLASS(klass); |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 187 | |
Marcel Apfelbaum | 125ee0e | 2013-07-29 17:17:45 +0300 | [diff] [blame] | 188 | set_bit(DEVICE_CATEGORY_MISC, dc->categories); |
Andreas Färber | db895a1 | 2012-11-25 02:37:14 +0100 | [diff] [blame] | 189 | dc->realize = testdev_realizefn; |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 190 | } |
| 191 | |
Andreas Färber | 8c43a6f | 2013-01-10 16:19:07 +0100 | [diff] [blame] | 192 | static const TypeInfo testdev_info = { |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 193 | .name = TYPE_TESTDEV, |
| 194 | .parent = TYPE_ISA_DEVICE, |
Gerd Hoffmann | 00e4d0d | 2013-01-07 12:59:43 +0100 | [diff] [blame] | 195 | .instance_size = sizeof(PCTestdev), |
Lucas Meneghel Rodrigues | ee0cc54 | 2012-12-13 12:48:53 -0200 | [diff] [blame] | 196 | .class_init = testdev_class_init, |
| 197 | }; |
| 198 | |
| 199 | static void testdev_register_types(void) |
| 200 | { |
| 201 | type_register_static(&testdev_info); |
| 202 | } |
| 203 | |
| 204 | type_init(testdev_register_types) |